package web

import (
	"io"
	"log"
	"strings"
	"testing"
)

// fix-3: a deployed-not-running app produces a self-clearing WARN dashboard banner; an empty list
// clears it. COMPANION red-proof: skip SetDeadAppAlerts entirely (the pre-fix-3 silence) → GetAlerts
// has no dead-app banner → the "not fut" assertion fails.
func TestDeadAppAlerts_PresentAndSelfClearing(t *testing.T) {
	am := NewAlertManager(log.New(io.Discard, "", 0))

	am.SetDeadAppAlerts([]DeadApp{{Name: "cwa", DisplayName: "Calibre-Web", State: "stopped"}})
	got := am.GetAlerts()
	if len(got) != 1 || got[0].Level != "warning" || !strings.Contains(got[0].Message, "Telepített alkalmazás nem fut: Calibre-Web") {
		t.Fatalf("expected a WARN dead-app banner, got %+v", got)
	}
	if !strings.Contains(got[0].Message, "stopped") {
		t.Errorf("banner should carry the state: %q", got[0].Message)
	}

	// The app recovers → an empty set clears the banner (state-based, no manual dismissal).
	am.SetDeadAppAlerts(nil)
	if got := am.GetAlerts(); len(got) != 0 {
		t.Fatalf("dead-app banner must self-clear when the app recovers, got %+v", got)
	}
}

// Above the group threshold, many dead apps collapse to ONE grouped banner (a reboot storm must not
// paper the dashboard).
func TestDeadAppAlerts_GroupedAboveThreshold(t *testing.T) {
	am := NewAlertManager(log.New(io.Discard, "", 0))
	var many []DeadApp
	for _, n := range []string{"radarr", "jellyfin", "navidrome", "calibre", "seerr"} {
		many = append(many, DeadApp{Name: n, DisplayName: n, State: "stopped"})
	}
	am.SetDeadAppAlerts(many)
	got := am.GetAlerts()
	if len(got) != 1 || !strings.Contains(got[0].Message, "5 telepített alkalmazás nem fut") {
		t.Fatalf("expected one grouped banner for %d dead apps, got %+v", len(many), got)
	}
}